Peter Alonso
24-Year-Old First Baseman1B
New York Mets AAA
2019 Fantasy Outlook
When factoring in his Arizona Fall League exploits, Alonso hit 42 home runs in 159 games last year, cementing himself as the top slugger in the minors. The 24-year-old first baseman has no problem squaring up elite velocity -- he took a 104-mph fastball out to center field in the Fall Stars game -- but can still be eaten up by good offspeed pitches. While the other top prospects expected to be called up in mid-to-late April, Vladimir Guerrero Jr. and Eloy Jimenez, project to be positive contributors in batting average and power right away, Alonso’s batting average will likely be closer to .230 than .270 in his first big-league season. That said, he has 80-grade power and should have no trouble posting big home run and RBI totals from day one. It is very rare that a R/R first base prospect emerges as a valuable dynasty-league asset, and the fact that Alonso has done so is a testament to his work ethic, which gets rave reviews. Read Past Outlooks
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Will receive invite to big-league camp
1BNew York Mets  AAA
November 5, 2018
Alonso will be invited to spring training and is expected to have the opportunity to compete for the starting job at first base, Mike Puma of the New York Post reports.
Alonso has yet to make his major-league debut despite putting together a .260/.355/.585 slash line with 21 home runs and 67 RBI across 67 games at Triple-A Las Vegas in 2018. He's expected to see a lot of at-bats during spring training, but teams typically send their top prospects back to the minors for a couple weeks to gain an extra year of control. Look for him to be up with the big club in mid-to-late April. He should hit for power right away, although strikeouts will likely be an issue, at least initially.
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Recent RotoWire Articles Featuring Peter Alonso
The Z Files: Prepping For the Stretch Run, Part Four
August 31st
Todd Zola completes his look at players and strategies that can move the needle over the final weeks of the season and wonders if Josh Donaldson will find himself in a new uniform.
Minor League Barometer: Notable Phenoms
August 30th
Jesse Siegel delivers his deep dive into the minors' most scintillating prospects heading into September call-up season.
Farm Futures: September Call-up Candidates
August 16th
James Anderson previews the players most likely to get added to September rosters, including a return engagement for Rockies second baseman Garrett Hampson.
NL FAAB Factor: Waiver Pickups of the Week
August 12th
Jan Levine looks at several closer changes that've already occurred -- looking at you, Marlins -- and at least one other that might happen soon.
Farm Futures: Ranking the Farm Systems
August 2nd
James Anderson unveils his second annual farm system rankings and is a little surprised at how high Vlad Guerrero Jr. and the Blue Jays have risen.
Past Fantasy Outlooks
A fairly easy player to evaluate, Alonso has a couple very clear strengths, and a couple very clear weaknesses. He has huge raw power -- his .231 ISO, which ranked second in the Florida State League, represented his career low in that metric. Alonso is also excellent at making contact, relative to most power hitters. His 18.5 percent strikeout rate at High-A was a career worst, and he struck out just 14.9 percent of the time in a brief 11-game run at Double-A to close the season. However, the right-handed slugger has dramatic splits. He absolutely obliterates left-handed pitching but is pretty mediocre against righties, especially for a first baseman. Additionally, he is a subpar defender, even at first base. The Mets have a better internal option in Dominic Smith, who is basically big-league ready, yet the organization is still entertaining ideas of getting a veteran placeholder there. If they follow through with that, Alonso would be a distant third on the organizational depth chart. He is probably best suited for the short side of a platoon in the American League.
As a right-handed first baseman who has yet to play in a full-season league, Alonso will not be showing up on real life prospect lists anytime soon. However, he should already be on the radar of dynasty league owners. Double-plus raw power is his calling card. That power was always on display at Florida, leading the Mets to select him with the 64th overall pick in 2016. His .266 ISO and 184 wRC+ illustrate how much damage he did in his brief 30-game run in the New York-Penn League, and his .969 OPS would have easily led the league if he had enough plate appearances to qualify. Alonso's hit tool, particularly his ability to hit right-handed pitching, will be what makes or breaks his ability to profile as a cleanup-hitting everyday player. Despite his gaudy overall numbers, he hit just .262/.306/.415 with a 4:15 BB:K in 65 at-bats against righties. Elite power makes him worth a flier in deeper formats, and it should become clear in a year if he is still worth a roster spot.
More Fantasy News
Won't be up in September
1BNew York Mets  AAA
August 28, 2018
Alonso will not be called up when rosters expand in September, Anthony DiComo of reports.
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Slugs 30th homer of season
1BNew York Mets  AAA
August 16, 2018
Alonso went 1-for-4 with a home run and two RBI for Triple-A Las Vegas in Wednesday's win over Fresno.
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Records four hits at Triple-A
1BNew York Mets  AAA
August 8, 2018
Alonso went 4-for-5 with a home run, a double and four RBI in Triple-A Las Vegas' 9-6 win over Iowa on Tuesday.
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Busts out with three hits
1BNew York Mets  AAA
July 21, 2018
Alonso went 3-for-4 with a home run, a triple and a walk for Triple-A Las Vegas on Friday.
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Promoted to Triple-A
1BNew York Mets  AAA
June 14, 2018
Alonso was promoted to Triple-A Las Vegas on Thursday,
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